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ACR33U-A1 – Reference Manual [e-mail]
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Where:
PROT y: Bytes containing the protection bits
SW1,SW2 = 90 00h if no error
The arrangement of the protection bits in the PROT bytes is as follows:
PROT 1 PROT 2 ….
P8 P7 P6 P5 P4 P3 P2 P1 P16 P15 P14 P13 P12 P11 P10 P9 .. .. .. .. .. .. P18 P17
Where:
Px is the protection bit of BYTE x in the response data
‘0’ byte is write protected
‘1’ byte can be written
8.3.5.5. WRITE_MEMORY_CARD
Command format (abData field in the PC_to_RDR_XfrBlock)
Pseudo-APDU
CLA INS
Byte Address
MEM_L Byte 1 .... .... Byte N
MSB LSB
FFh D0h
Where:
MSB Byte Address = 0000 00A
9
A
8
b is the memory address location of the memory card
LSB Byte Address = A
7
A
6
A
5
A
4
A
3
A
2
A
1
A
0
b is the memory address location of the memory
card
MEM_L: Length of data to be written to the memory card
Byte x: Data to be written to the memory card
Response data format (abData field in the RDR_to_PC_DataBlock)
SW1 SW2
Where:
SW1, SW2 = 90 00h if no error
8.3.5.6. WRITE_PROTECTION_MEMORY_CARD
Each of the bytes specified in the command is internally in the card compared with the byte stored at
the specified address and if the data match, the corresponding protection bit is irreversibly
programmed to ‘0’.